Centrifugal machine.



No. 8191,2'71. PATBNTED JUNE 23, 1908. B. LJUNGSTRM. CENTRIFUGALMACHINE.

APPLICATION FILED JUNE 26.1906.

4 SHEETS-.SHEET 2.

w/ rA/Essfs.- /A/vf/vron PATENTED JUNE 23, 1908.

T n mf JM u N WH E 0 n V m U .A m J; www. NN .mm .MGM wim @w 1 UGF .JUNLFO IT.. REM mlnu mn GM I PATENTED JUNE 2.3, 1908. B. LJUNGSTRM.

GENTRIFUGAL MACHINE.

.APPLICATION FILED JUNE 26. 1906.

4 SHBETS-SHBET 4.

l UNITED sTATEs PATENT oEEIoE.

BIRGER LJ UN GSTRM, OF STOCKHOLM, SWDEN, ASSIGNOR TO AKTIEBOLAGETSEPARATOR,

STOCKHOLM, SWEDEN.

CENTRIFGAL MACHINE.

To all whom it may concern:

Be it known that I, BIRGER LJUNGsTRM, a subject of the King of Sweden,and residing at 8 Fleminggaten, Stockholm, Sweden, engineer,haveinvented certain new and useful Improvements in Centrifugal Machinesand I doY hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled intheart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of referhavebeen used for a short while, it has been found that they willnot work ina` satisfactory manner since the outlets become choked with the solids,so that the liquids cannot pass away. tion is to avoid theseinconveniences.

Generally speaking, I accomplish the result by providing devices whichare movable in said outlets to drain the liquid from the solids. Saidmovable device tmay have either a reciprocating or a rotating'motion,whereby, so as to speak, movable outlets are formed, or they maybe movedinto and out of the' outlets, or certain parts thereof. In

. the former case, the outlet is formed between the fixed and movablepart of the apparatus, which will prevent solids from collecting in saidoutletsl and in the latter case the outlets will -be cleared' by meansof a kind of' scraper. The invention is shown in the annexed drawings inthe several forms of construction. Figures 1 and 2 show an'emboclimentof myy invention, in which Fig. 1 is a partial section on line 1-1. Fig.2 is a planview. Figs. 3 and 4 show another embodiment-"ofV myinvention, in whichFig. 3 is an elevation, partially in section, on line3-3, Fig. 4. Fig. 4 is a plan view, artially in section, on line 4 4,Fig. 3. ligs. 5 and 6 show another embodiment of my invention, in whichFig. 5 is an elevation, partially in section, and Fig. 6 is an invertedplan view of Scrapers and Specification of Letters Patent.

Application filed June 26, 1906.` Serial No. 328,444.

The object of my present inven` provided with holes p for t e plates Z.

Patented June 23, 1908.

device to which they vare attached., Figs. 7

and 8 show another embodiment .ot my`invention, inwhich Fig. 7 is apartial cross section through the machine, and Fig. 8^is an elevation ofscraper plate and attached Scrapers. F ig. 9 is another embodiment of myinvention, shown in partial section. Fig. 10 is another` embodiment ofmy invention, shown in partial section.

, In Figs. 1 and 2, a are a series of concentric rings, connectedtogether by anges y. c are concentric rings distributed in the spacesbetween the rings a, said rings c being connected together by flangesd.- The liquid outlets are formed by the spaces b between the rings d.The rings a. are mounted upon, or connected to, a hollow shaft g;Through this hollow shaft g projects the shaft f, upon which is mounted,or to which is connected, the rings c. During the operation of themachines, the two shafts f and g are rotated at different speeds, sothat the rings a. and

When

c will move relatively to each other.

the material-from which the liquid is tov be removed is fed in throughthe upper opening, it will slide along the inclined wall, formed by therings. The liquid passesL away through the spaces or outlets b, whilethe solids slide down to the -bottom of the machine and from whence theypass through suitable openings, not shown. 'IfK the solids should entervthe outlets b, they .would soon pass to the eX- terior of the machine,as they yare compelled to alter their position on accoint of therelative motion of the rings.

In the embodiment of my invention shown in Figs.- 3 and 4, thesamefprinciple 'is illustrated as in Figs. 1 andf2 butin this casecurvedl plates are,l used.I h are several parts of a compound curvedplate, which parts are placed at some distance from each other andsecured to an upper plate t and a lower plate k. In the spaces betweenthe' parts h are arranged other curved plates l. The plates l,V aresecured to a plate m, connected to a central hollow shaft 'n surroundina solid shaft o to the top of which the platev carrying the parts 71. issecured. 'The When the machine is in operation, the two shafts n. and oare rotated at the samerateof speed, but during said rotation arerelatively reciprocated in4 axial direction, by means not lates fl and karement of my invention is shown. This con# struction is somewhatsim'ilar` to that shown in Figs. 1 and 2. The rings w are separated fromone another by spaces w', which, however, in this case are very narrow.Instead of rings, moving in said outlets, Scrapers t 4the use of curvedplates 5.

are arranged therein, which, preferably, have their edges inclined, asshown in Fig. 6. The Scrapers are connected together and secured to theplate v by means of ribs or flanges u, said plate being connected to theshaft The other shaft z is connected to the rings w. The solids whichcollect in the outlets lw will soon be removed by` the Scrapers t, whichmove in said outlets owing to the shafts w and z rotating at differentspeeds.

In Fig. 6, the plate o, with the scrapers t, is shown from below.-

The construction shown in Figs; 7 and 8 differs from that shown in Figs.5 and 6 in The latter is provided with slots 6 in which are arrangedscrapers 7. The said Scrapers are secured to a plate 8,` and the plates5 may be 'secured to a lower disk 9 and an upper disk 10, which areconnected to one shaft, while the disk 8 may be connected to anotherand'concentric shaft, the shafts being revolved at same rates of speedand given a relative recipro-` cating motion in an axial direction, asstated with respect to Figs'. '8 and4.

In ythe construction shown in Fig. 9, 12 designates a conical drum,secured to the shaft 13. tures 14 in which are located pins 15, se-

cured to a plate 17, mounted o n ay hollow shaft 18, surroundin theshaft'13 carrying 'the drum. The sha ts\13 and 18 rotate lat thesamespeed, but have a relative reciprol catingmotion in an aXialdirectionl by mechanism not shown. If the pins 15 only move in theapertures 14, a form of movable outlet is formed', but if, on the' otherhand, they move com letely into and out of said apertures, inw ich casethe latter must be of very small dimensional in order 'to prevent ythesolids escaping directlytherefrom,the saidpins will act as scrapers andforce out the solidswhich have collected in said apertures 14.

In Fig. 10, another embodiment of my invention is shown. In this case,the material is carried along the inner wall of a series of Said drum isprovided with aper-k rings, forming a cylindrical drum 20, byy ymeans ofa screw.

20 designates the drum and 21 the annular openings between the rings ofthe drum.

i l28 is the hollow drum shaft and 22 a solid shaft therein, carrying aplate 23, supporting an inner drum 24. The latter is provided collect insai( openings', will be forced out therefrom by means of the sc apers27.

Having now fully describe my invention, `what I claim and desire toprotect by Letters Patent is':4 l

1. The combination, with centrifugal machines for drying purposes,having outlets for draining the liquid from the solids, of devicesmovable in said outlets to clear them from solids.

2. The combination, with centrifugal machines for drying purposes,having outlets for draining the liquid from the solids,l of deviceswithin said outlets and movable relative to said outlets to clear saidoutlets fromv'solids.

8. The combination, with centrifugal machines for drying purposes,having annular outlets for draining the liquid from the solids,ofdevices movable in said outlets ,to clear them from solids.

4. The combination, with centrifugal machinesl for drying purposes,having annular outlets for draining the liquid from the solids,of'inclined devices movable in said outlets to clear them from solids.

5.l The combination, with lcentrifugal machines forv drying purposes,provided with outlets for draining the iquid from the solids, of aconveying device to carry the material through the machine, and scraperssecured to said conveying device'v and movable in said outlets.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

BIRGER LJUNGSTROM.

Witnesses.:

IIJ. ZETTERSTRM, HARRY- ALBrHN.

with one. or more helical blades 26, inclined Scrapers y27 projectinginto the afore- The two shafts 28 and 22

